Solve the following equation using the GRASS method 2. A kettle was tested for its energy efficiency. Its power rating was 900 W. The
temperature of 1.0 L of water increased from 24°C to 48°C in a time of 4 minutes
and 30 seconds.

a. Calculate the energy efficiency of the kettle.

b. Why is the kettle not 100% efficient? What happened tỏ the "missing" energy?

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.